This raises an interesting problem, with which, as a new Catholic, I'm not very familiar. From what I see on sites like Fr Z's blog and what I can gather from occasional remarks by priests, dioceses seem to show great interest in parish tithes, registrations, and their relation to mass times and the number of priests assigned to a parish. Last year at Our Mother of Good Counsel, for instance, there was a drive for formal registration, followed a couple of months later by the announcement that mass times would be reduced.
The parish had had three priests (including one visiting from Mexico who was handling the Spanish masses); when he returned to Mexico, he was not replaced, and the mass schedule was reduced.
This says to me that diocesan priests are under some pressure to watch their numbers. To put an Ordinariate mass time on the diocesan parish website that could, at least potentially, reduce the numbers they report to the diocese -- or reduce the offertory tithed to the diocese -- isn't necessarily in the interest of the diocesan parish.
Naturally, there are other issues, which could make this question entirely theoretical. If the diocesan parish has only guitar-and-tambourine masses where everyone holds hands around the altar, while the Ordinariate group has something more reverent, that could attract some diocesan parishioners away from the diocesan mass. I'm not sure if this actually takes place anywhere, since I know diocesan parishes exist that have reverent masses with organ and choir, while Ordinariate groups exist that have masses with guitar. So it's quite possible that actual circumstances and the actual very small numbers involved in both the number and membership of Ordinariate groups make this a non-issue.
I would be interested to hear the insights of other visitors.
